All 22 arenas have been remade to make them look more interesting and fun/challenging to fight in.
Simple installation and savegame compatible. See thread at Taleworlds for screenshots (and later a trailer)

INSTALLATION:
Place the downloaded files in the SceneObj folder in 'native' or any mod you like. (Click yes to overwriting). That's all.

IMPORTANT:
You might wish to backup the SceneObj folder in case you want to revert the installation.